<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
   
     <!-- 卡片区域 -->
    <el-card>
      <!-- 角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col> 
      </el-row>

      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template v-slot="scope">
           
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children"
                :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span='5'>
                <el-tag closable @close="removeRightById(scope.row,item1.id)"> {{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!-- 渲染二级和三级权限 -->
              <el-col :span='19'>
                <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                     <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
             <!-- <pre>
            {{scope.row}} 
             </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
           <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
           <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
           <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="30%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps"  show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allowRight">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default{
  data() {
    return {
      // 获取所有角色列表数据
      rolesList:[],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限数据
      rightsList: [],
      // 树形控件的绑定数据
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defkeys: [ ],
      // 当前即将分配权限的角色ID
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
      // 获取角色列表
      async getRolesList() {
        const { data:res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败')
        }
        this.rolesList = res.data
        console.log(this.rolesList)
      },
      // 根据ID删除对应的权限
     async removeRightById(role, rightId) {
        // 弹框提示用户是否要删除
        const confirmResult =  await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if(confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }
        // console.log('确认了删除！')
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        // this.getRightsList()
        role.children = res.data
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败')
        }
        this.rightsList = res.data
        console.log(this.rightsList)
        // 递归获取三级节点的ID
        this.getLeafKeys(role,this.defkeys)
        // 显示对话框
        this.setRightDialogVisible = true
      },
      // 通过递归形式，获取角色下所有三级权限的id,并保存到数组defkeys中储存
      getLeafKeys(node, arr) {
        // 如果当前 node节点不包含children属性，则是三级节点
        if(!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defkeys = []
      },
      // 点击确定，为角色分配权限
      async allowRight() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        //获取到选中的ID值
        // console.log(keys)
        const idStr = keys.join(',')
        const { data: res } =  await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }
        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
  }
}
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }
  .bdtop {
    border-top: 1px solid #eee;
  }
  .bdbottom {
    border-bottom: 1px solid #eee;
  }
  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
